Apparatus for tape loading device

Abstract

A tape loading device .includes a drum base, a rotary head drum mounted on the drum base, and a loading ring rotatably supported on the drum base. The tape loading device loads a tape on a predetermined tape path by the movement of a loading post which is achieved by the rotation of the loading ring. The loading ring has a plurality of protruding portions on an inner peripheral surface thereof. The protruding portions protrude in a radial direction. The drum base has a groove portion on an outer peripheral portion thereof which engages with the plurality of protruding portions and thereby rotatably supports the loading ring.

What is claimed is: 
     
       1. A video tape recorder apparatus comprising: a drum base having a first circular guide groove lying in one plane therein;   a rotary head drum having at least one head thereon, said rotary head drum being mounted on said drum base;   first rotating means for rotating said rotary head drum;   a first loading ring having a plurality of first protruding portions disposed on an inner peripheral portion thereof, said first protruding portions protruding in a radial direction of said first loading ring, said first loading ring being rotatably mounted on said drum base by the engagement of said plurality of first protruding portions with said first circular guide groove of said drum base;   second rotating means for rotating said first loading ring; and   a loading post which is moved by the rotation of said first loading ring to load a tape in a predetermined tape path which includes a peripheral surface of said rotary head drum.   
     
     
       2. An apparatus according to claim 1, wherein a portion of each of said first protruding portions which makes contact with and slides against said first guide groove has an arcuate form. 
     
     
       3. An apparatus according to claim 1, wherein said first guide groove has a plurality of introducing portions into which said plurality of first protruding portions are fitted to insert said first protruding portions into said first guide groove. 
     
     
       4. An apparatus according to claim 3, wherein a number of said first protruding portions is the same as a number of said introducing portions. 
     
     
       5. An apparatus according to claim 4, wherein both the number of said first protruding portions and the number of said introducing portions are three. 
     
     
       6. An apparatus according to claim 4, wherein a rotational angle of said first loading ring is set in such a manner that rotation of said loading ring does not cause said first protruding portions to become aligned with said introducing portions. 
     
     
       7. An apparatus according to claim 3, wherein said drum base has a plurality of rotary head drum mounting portions respectively mounted above said plurality of introducing portions. 
     
     
       8. An apparatus according to claim 1, further comprising: a second circular guide groove provided on said drum base;   a second loading ring having a plurality of second protruding portions disposed on an inner peripheral portion thereof, said plurality of second protruding portions protruding in a radial direction of said second loading ring. said second loading ring being rotatably mounted on said drum base by the engagement of said plurality of second protruding portions with said second circular guide groove of said drum base; and   means for rotating said second loading ring.   
     
     
       9. An apparatus according to claim 8, wherein said first and said second loading rings are rotated in different directions. 
     
     
       10. An apparatus according to claim 1, wherein said drum base comprises a molded product, and wherein said first loading ring is made of a metal. 
     
     
       11. A tape loading device comprising: a base having a cylindrical portion with a guide portion provided on an outer periphery thereof and lying in one plane; a first loading ring having an engaging portion on an inner peripheral portion thereof, said engaging portion engaging said guide portion;   means for rotating said first loading ring; and   a guide post coupled to said first loading ring, said guide post moving in accordance with a rotation of said first loading ring, to form a predetermined tape path.   
     
     
       12. A device according to claim 11, wherein said guide portion comprises a groove, and wherein said engaging portion comprises a protruding portion formed on said first loading ring. 
     
     
       13. A device according to claim 12, further comprising a second protruding portion provided on said first loading ring. 
     
     
       14. A device according to claim 13, wherein said guide groove has a plurality of introducing portions into which said plurality of protruding portions are fitted to insert said plurality of protruding portions into said guide groove. 
     
     
       15. A device according to claim 12, further comprising a second loading ring and a second guide groove and means for rotating said second loading ring. 
     
     
       16. A device according to claim 15, wherein said first and said second loading rings are rotated in different directions.